[ARC5] Fw: Power Supplies for the ARC-5 Rx.: VOLTAGE MULTIPLIER

[Henry Mei'l's]

My point being that all you need to add are some capacitors, diodes,
some load resistors, but no extra transformer (or diode bridges).

Henry, Cph.

----- Original Message ----- 
From: "Henry Mei'l's" <meils at get2net.dk>
To: <arc5 at mailman.qth.net>
Sent: Saturday, January 29, 2011 7:48 AM
Subject: [ARC5] Fw: Power Supplies for the ARC-5 Rx.



>> Hello Dennis, et al -
>>
>> Why not add a voltage multiplier to the LV filament supply as source
>> for your 60-70V ?
>>
>> Henry, oz1uf  n2nr
>>
>> ----- Original Message ----- 
>> From: "Dennis Monticelli" <dennis.monticelli at gmail.com>
>> To: "Jess Lewis" <kr4oj at bellsouth.net>
>> Cc: <arc5 at mailman.qth.net>
>> Sent: Saturday, January 29, 2011 6:13 AM
>> Subject: Re: [ARC5] Power Supplies for the ARC-5 Rx.
>>
>>
>>> Hi Jess,
>>>
>>> I share your affection.
>>>
>>> Why not just use a stack of 9V batteries for B+?  Putting more than 
>>> about
>>> 70V on the receiver does not improve performance much and the caps will
>>> thank you for it.  You can power the filaments off any convenient LV
>>> power
>>> supply.  This is usually the way I power them.
>>>
>>> On Fri, Jan 28, 2011 at 10:56 AM, Jess Lewis <kr4oj at bellsouth.net> 
>>> wrote:
>>>
>>>> ?Hello,
>>>> I just joined this list. I have several old ARC-5 Receivers (various
>>>> freqs)
>>>> and a couple of the transmitters. Most from E-Bay, in the past year or
>>>> so. 2
>>>> of each are "un-hacked" :o)) and I also have a couple of the Dynamotors
>>>> for
>>>> the receivers.
>>>>
>>>> I have loved the old units, since I first became aware of them, from CQ
>>>> magazine, back in the 50's. Got my ham license in 1965, and always 
>>>> meant
>>>> to
>>>> convert a few & get on the air. But, alas, I found a deal on some used
>>>> Heathkit stuff, went that way, and never got back to the ARC5s except a
>>>> Q5'er, using the BC453 & a converter (not really a "Q5er", but a pretty
>>>> good
>>>> rx for 40 meters.)
>>>>
>>>> I would like to try and put some of the stuff on the air, without
>>>> hacking
>>>> up the unit, anymore than I have to, mainly for cosmetic and nostalgia
>>>> purposes. I know that several , probably most of the caps, will need
>>>> replacing, and Ken Gordon (W7EKB), sent me some good ideas about 
>>>> opening
>>>> various potted units, replacing the internal caps, then re-potting.
>>>>
>>>> My ACTUAL question (and reason for posting) is about power supplies for
>>>> the
>>>> receivers. Recently, I saw on E-Bay, several neat little power 
>>>> supplies,
>>>> built on the original Dynamotor frames, and would plug into the 
>>>> original
>>>> Dynamotor socket. Several have sold already, actually for an
>>>> unbelievable
>>>> price :^)).
>>>> I understand that the original power supply units were built and 
>>>> offered
>>>> for sale, by Fair Radio Sales, in Lima, Ohio.  They, of course, no
>>>> longer
>>>> have any. Does anyone know of a possible source for these PS units?
>>>> Even a
>>>> source for the transformer?  I have the dynamotor base and most of the
>>>> parts
>>>> to fab one up, if I could only find the transformer.
>>>> Any help or suggestions are welcome.
>>>>
>>>> Thanks for listening.
>>>> 73,
>>>> Jess  KR4OJ
>>>>
>>
>
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